Impact of nano-particles shapes on Al₂O₃-water nano-fluid flow due to a stretching cylinder

Abstract

Purpose The purpose of this study is to theoretically probe the shape impacts of nano-particle on boundary layer flow of nano-fluid toward a stretching cylinder with heat-transmission effects. The base fluid used for this study is pure water, and aluminum oxide nano-particles are suspended in it. Four different shapes of nano-particle, namely, cylindrical, brick, platelets and blades, are considered to carry out the study. Design/methodology/approach The problem is modelled mathematically and the nonlinear system of equations is attained by using appropriate transmutations. The solution of transmuted equations is achieved by utilizing a shooting technique with Fourth-Fifth order Runge–Kutta Fehlberg scheme. Numerically attained results are elucidated through graphs and tables which are further compared under limiting cases with existing literature to check the validity of the results. Findings It is observed that fluid velocity and temperature of cylindrical shaped water nano-fluids are more than the nano-fluid having brick-shaped nano-particles. Moreover, it is seen that the nano-fluids suspended with platelets-shaped nano-particles have higher velocity and temperature than the nano-fluids containing blade-shaped nano-particles. The curvature parameter and nano-particles volume fraction have increasing effects on flow velocity and temperature of nano-fluids containing all types of nano-particle shapes. Originality/value Numerous authors have examined the impacts of nano-particle shapes on characteristics of heat transfer and fluid flow. However, to the best of the authors’ knowledge, the shape impacts of nano-particles on boundary layer flow of nano-fluid toward a stretching cylinder with heat-transmission effects have not been discussed. So, to fulfill this gap, the present paper explicates the impacts of various nano-particle shapes on Al2O3–water-based nano-fluid flow past a stretching cylinder with heat-transfer effects.

Entropy production with the flow of nanomaterials through the permeable stretched surface with heterogeneous–homogenous chemical reaction

“…In the chemical reaction X / Ŷ the coupling term, −ScKJ(1 − J) 2 in eqn ( 20), the parameter K, appears. The species Ŷ boundary layer equation contains a related cross-link term, as shown in eqn (12). However, these concept polarities are diametrically opposite.…”

“…In order to study the effects of chemical radiation on a spherical-shaped cylinder encased in a porous medium, Tlili et al 11 used multiple slip effects on an MHD non-Newtonian nanofluid. Haider et al 12 theoretically and numerically explored the impact of the nanoparticle shape on a water-based aluminium oxide nanofluid moving towards a solid cylinder with the consequences of heat transfer. Khamliche et al 13 used Cu nanoparticles to create high thermal conductivity nanofluids.…”

Numerical investigation of conjugate heat transfer and entropy generation of MHD natural convection of nanofluid in an inclined enclosure

“…Their results that revealed by enhancing the porosity, the averaged Nu number increased, especially at low Darcy number (Izadi et al , 2019). Haider et al (2019) and carried a numerical simulation to study the nanoparticle shape in the stretching cylinder.…”